Optimal Size and Design: Each disc measures 6 inches in diameter with a 1/2 inch arbor hole and a thickness of 1.5mm. The extremely flat and parallel design ensures a seamless fit, while the embedded abrasive particles facilitate fast cutting and precise faceting. Versatile Grit Selection: The set includes six distinct grit sizes: #80, #400, #600, #800, #1500, and #3000. This range allows for everything from coarse grinding (#80, #400) and medium grinding (#600, #800) to fine grinding (#1500) and polishing (#3000), catering to various stages of the polishing process. Wide Application Spectrum: Ideal for cutting or sanding stones and glass, these discs are particularly beneficial for jewelry lapidary work, including polishing crystals, agates, jewels, and jades. Their versatility makes them an essential tool for professionals and hobbyists alike. Ease of Use and Quality Assurance: These grinding discs are not only designed for efficiency but also for ease of use. Their high-quality, -new condition and thoughtful design allow for seamless integration into your existing toolkit, enhancing your crafting potential., Weight: 1.98856960324 pounds, Manufacturer: Aisuoka